var Readable=require('stream').Readable;
var Writable=require('stream').Writable;

var readStream=new Readable();
var writStream=new Writable();

readStream.push('I ');
readStream.push('HO');
readStream.push(null);

writStream._write=function(chunk,encode,cb){
  console.log(chunk.toString());
  cb();
}

readStream.pipe(writStream);
